Question

x÷ 1 phần 2=4 phần 5

Answer 1

\(x:\dfrac{1}{2}=\dfrac{4}{5}\)

\(x=\dfrac{4}{5}.\dfrac{1}{2}\)

\(x=\dfrac{2}{5}\) (thỏa mãn)

Vậy \(x=\dfrac{2}{5}\) là giá trị cần tìm

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Answer 2

\(x:\dfrac{1}{2}=\dfrac{4}{5}\)

\(\Leftrightarrow x=\dfrac{4}{5}\cdot\dfrac{1}{2}\\ \Leftrightarrow x=\dfrac{2}{5}\)

Answer 3

x : \(\dfrac{1}{2}=\dfrac{4}{5}\)

=> x = \(\dfrac{4}{5}.\dfrac{1}{2}\)

=> x = \(\dfrac{4.1}{5.2}\)

=> x = \(\dfrac{2}{5}\)

Vậy x = \(\dfrac{2}{5}\)